The debt of developing countries refers to the external debt incurred by governments of developing countries, generally in quantities beyond the governments' ability to repay. "Unpayable debt" is external debt with interest that exceeds what the country's politicians think they can collect from taxpayers, based on the nation's gross domestic product, thus preventing it from ever being repaid. The causes of debt are a result of many factors.

Some of the current levels of debt were amassed following the 1973 oil crisis. Increases in oil prices forced many poorer nations' governments to borrow heavily to purchase politically essential supplies. At the same time, OPEC funds deposited in western banks provided a ready source of funds for loans. While a proportion of borrowed funds went towards infrastructure and economic development financed by central governments, a proportion was lost to corruption and about one-fifth was spent on arms.

There is much debate about whether the richer countries should be asked for money which has to be repaid. The Jubilee Debt Campaign gives six reasons why the third world debts should be cancelled. Firstly, several governments want to spend more money on poverty reduction but they lose that money in paying off their debts. Jeff Rubin agrees with this stance on the basis that the money could have been used for basic human needs and says is Odious Debt.[1] Secondly, the lenders knew that they gave to dictators or oppressive regimes and thus, they are responsible for their actions, not the people living in the countries of those regimes. For example, South Africa has been paying off $22 billion which was lent to stimulate the apartheid regime.They have yet to recover from this, their external debt has increased to $136.6 billion while the amount of people in the housing backlog has increased to 2.1 million from 1994's 1.5 million.[2][3] Also, many lenders knew that a great proportion of the money would sometime be stolen through corruption. Next, the developing projects that some loans would support were often unwisely led and failed because of the lender's incompetence. Also, many of the debts were signed with unfair terms, several of the loan takers have to pay the debts in foreign currency such as dollars, which make them vulnerable to world market changes. The unfair terms can make a loan extremely expensive, many of the loan takers have already paid the sum they loaned several times, but the debt grows faster than they can repay it. Finally, many of the loans were contracted illegally, not following proper processes.[4]

A seventh reason for canceling out some debts is that the money loaned by banks is generally created out of thin air, sometimes subject to a small capital adequacy requirement imposed by such institutions as the Bank of International Settlements. Maurice Félix Charles Allais (born 31 May 1911), 1988 winner of the Nobel Memorial Prize in Economics commented on this by stating: "The ‘miracles’ performed by credit are fundamentally comparable to the ‘miracles’ an association of counterfeiters could perform for its benefit by lending its forged banknotes in return for interest. In both cases, the stimulus to the economy would be the same, and the only difference is who benefits."[5]

Some people argue against forgiving debt on the basis that it would motivate countries to default on their debts, or to deliberately borrow more than they can afford, and that it would not prevent a recurrence of the problem. Economists refer to this as a moral hazard.

An example of debt playing a role in economic crisis was the Argentine economic crisis. During the 1980s, Argentina, like many Latin American economies, experienced hyperinflation. As a part of the process put in place to bring inflation under control, a fixed exchange rate was put into place between Argentina's new currency and the US dollar. This guaranteed that inflation would not restart, since for every new unit of currency issued by the Argentine Central Bank, the Central Bank had to hold a US dollar against this – therefore in order to print more Argentine currency, the government required additional US dollars. Before this currency regime was in place, if the government had needed money to finance a budget deficit, it could simply print more money (thus creating inflation). Under the new system, if the government spent more than it earned through taxation in a given year, it needed to cover the gap with US dollars, rather than by simply printing more money. The only way the government could get these US dollars to finance the gap was through higher tax of exporters' earnings or through borrowing the needed US dollars. A fixed exchange rate was incompatible with a structural (i.e., recurrent) budget deficit, as the government needed to borrow more US Dollars every year to finance its budget deficit, eventually leading to an unsustainable amount of US dollar debt.

Argentina's debt grew continuously during the 1990s, increasing to above $120 billion USD. As a structural budget deficit continued, the government kept borrowing more, creditors continued to lend money, while the IMF suggested less state spending to stop the government's ongoing need to keep borrowing more and more. As the debt pile grew, it became increasingly clear the government's structural budget deficit was not compatible with a low inflation fixed exchange rate – either the government had to start earning as much as it spent, or it had to start (inflationary) printing of money (and thus abandoning the fixed exchange rate as it would not be able to borrow the needed amounts of US dollars to keep the exchange rate stable). Investors started to speculate that the government would never stop spending more than it earned, and so there was only one option for the government – inflation and the abandonment of the fixed exchange rate. In a similar fashion to Black Wednesday, investors began to sell the Argentine currency, betting it would become worthless against the US dollar when the inevitable inflation started. This became a self-fulfilling prophecy, quickly leading to the government's US dollar reserves being exhausted. The crisis led to riots in December 2001. In 2002, a default on about $93 billion of the debt was declared. Investment fled the country, and capital flow towards Argentina ceased almost completely.

The Argentine government met severe challenges trying to refinance the debt. Some creditors denounced the default as sheer robbery. Vulture funds who had acquired debt bonds during the crisis, at very low prices, asked to be repaid immediately. For four years, Argentina was effectively shut out of the international financial markets.

Argentina finally got a deal by which 77% of the defaulted bonds were exchanged by others, of a much lower nominal value and at longer terms. The exchange was not accepted by the rest of the private debt holders, who continue to challenge the government to repay them a greater percentage of the money which they originally loaned. The holdouts have formed groups such as American Task Force Argentina to lobby the Argentine government, in addition to seeking redress by attempting to seize Argentine foreign reserves.

39 impoverished countries[who?] have recently received partial or full cancellation of loans from foreign governments and international financial institutions, such as the IMF and World Bank.[6]

Under the Jubilee 2000 banner, a coalition of groups joined together to demand debt cancellation at the G7 meeting in Cologne, Germany. As a result, finance ministers of the world's wealthiest nations agreed to debt relief on loans owed by qualifying countries.[7]

A 2004 World Bank/IMF study found that in countries receiving debt relief, poverty reduction initiatives doubled between 1999 and 2004. Tanzania used savings to eliminate school fees, hire more teachers, and build more schools. Burkina Faso drastically reduced the cost of life-saving drugs and increased access to clean water. Uganda more than doubled school enrollment.[8]

In 2005, the Make Poverty History campaign, mounted in the run-up to the G8 Summit in Scotland, brought the issue of debt once again to the attention of the media and world leaders. Some have claimed that it was the Live 8 concerts which were instrumental in raising the profile of the debt issue at the G8, but these were announced after the Summit pre-negotiations had essentially agreed the terms of the debt announcement made at the Summit, and so can only have been of marginal utility. Make Poverty History, in contrast, had been running for five months prior to the Live 8 announcement and, in form of the Jubilee 2000 campaign (of which Make Poverty History was essentially a re-branding) for ten years. Debt cancellation for the 18 countries qualifying under this new initiative has also brought impressive results on paper. For example, it has been reported that Zambia used savings to significantly increase its investment in health, education, and rural infrastructure. The fungibility of savings from debt service makes such claims difficult to establish. Under the terms of the G8 debt proposal, the funding sources available to Heavily Indebted Poor Countries (HIPC) are also curtailed; some researchers have argued that the net financial benefit of the G8 proposals is negligible, even though on paper the debt burden seems temporarily alleviated.[9]

The 2005 HIPC agreement did not wipe all debt from HIPC countries, as is stated in the article. The total debt has been reduced by two-thirds, so that their debt service obligations fall to less than 2 million in one year. While celebrating the successes of these individual countries, debt campaigners continue to advocate for the extension of the benefits of debt cancellation to all countries that require cancellation to meet basic human needs and as a matter of justice.

To assist in the reinvestment of released capital, most International Financial Institutions provide guidelines indicating probable shocks, programs to reduce a country’s vulnerability through export diversification, food buffer stocks, enhanced climate prediction methods, more flexible and reliable aid disbursement mechanisms by donors, and much higher and more rapid contingency financing. Sometimes outside experts are brought to control the country's financial institutions.

When the 2004 Indian Ocean earthquake and tsunami hit, the G7 announced a moratorium on debts of twelve affected nations and the Paris Club suspended loan payments of three more.[11] By the time the Paris Club met in January 2005, its 19 member-countries had pledged $3.4 billion in aid to the countries affected by the tsunami.

The debt relief for tsunami-affected nations was not universal. Sri Lanka was left with a debt of more than $8 billion and an annual debt service bill of $493 million. Indonesia retained a foreign debt of more than $132 billion[12] and debt service payments to the World Bank amounted to $1.9 billion in 2006. In 2015 the total debt of Sri Lanka is $55 billion. Some of this is due to borrowing to help with infrastructure and some of it is due to corruption. The last time they sought help from the IMF was 2009, they received a $2.6 billion loan. They have yet to recover from the tsunami.[13]

Opponents of debt cancellation suggested that structural adjustment policies should be continued. Structural adjustments had been criticized for years for devastating poor countries.[14] For example, in Zambia, structural adjustment reforms of the 1980s and early 1990s included massive cuts to health and education budgets, the introduction of user fees for many basic health services and for primary education, and the cutting of crucial programs such as child immunization initiatives.

Countries that qualify for the HIPC process will only have debts to the World Bank, IMF and African Development Bank canceled. Criticism was raised over the exceptions to this agreement as Asian countries will still have to repay debt to the Asian Development Bank and Latin American countries will still have to repay debt to the Inter-American Development Bank. Between 2006 and 2010 this amounts to US$1.4 billion for the qualifying Latin American countries of Bolivia, Guyana, Honduras and Nicaragua.[15]